Stock-Based Compensation And Employee Benefit Plans (Restricted Stock Units Vesting Description) (Details)	12 Months Ended
	Mar. 31, 2018
One Year Vesting With One Hundred Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	1 year
Thirty Five Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	35 months
Three Year Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	3 years
Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	4 years
Four Year Vesting With Fifty Fifty Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	4 years
Vesting Year1 [Member] | One Year Vesting With One Hundred Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	100.00%
Vesting Year1 [Member] | Thirty Five Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	11 months
Cliff Vesting Percentage	33.33333%
Vesting Year1 [Member] | Three Year Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	33.33333%
Vesting Year1 [Member] | Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	25.00%
Vesting Year2 [Member] | Thirty Five Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	23 months
Cliff Vesting Percentage	33.33333%
Vesting Year2 [Member] | Three Year Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	33.33333%
Vesting Year2 [Member] | Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	25.00%
Vesting Year2 [Member] | Four Year Vesting With Fifty Fifty Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	50.00%
Vesting Year3 [Member] | Thirty Five Month Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Period	35 months
Cliff Vesting Percentage	33.33333%
Vesting Year3 [Member] | Three Year Vesting With Thirty Three Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	33.33333%
Vesting Year3 [Member] | Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	25.00%
Vesting Year4 [Member] | Four Year Vesting With Twenty Five Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	25.00%
Vesting Year4 [Member] | Four Year Vesting With Fifty Fifty Percent [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cliff Vesting Percentage	50.00%